/*
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998-2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Don Bragg <dbragg@netscape.com>
 *   Samir Gehani <sgehani@netscape.com>
 *   Mitch Stoltz <mstoltz@netscape.com>
 *
 *   Lan Qiang <jameslan@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK *****
 */

#ifndef nsZipFileIO_h__
#define nsZipFileIO_h__

#include "nspr.h"
#include "nsIZipFileIO.h"
#include "nsCOMPtr.h"
#include "nsIFile.h"
#include "nsIStringEnumerator.h"
#include "zlib.h"

#define NBUCKETS 6
#define BY4ALLOC_ITEMS 320
#define ZIP_PACKING_BUFLEN    32768
// Keep this odd. The -1 is significant.
#define ZIP_BUFLEN    (4 * 1024 - 1)

void * PR_CALLBACK zlibAlloc(void *opaque, uInt items, uInt size);
void PR_CALLBACK zlibFree(void *opaque, void *ptr);
nsresult gZlibInit(z_stream *zs);

class nsZipIOStatus : public nsIZipIOStatus
{
public:
	NS_DECL_ISUPPORTS
		NS_DECL_NSIZIPIOSTATUS

		nsZipIOStatus();

private:
	nsCOMPtr<nsIFile>        mIOFile;
	PRUint64                 mBytesTotal;
	PRUint64                 mBytesProcessed;
	PRUint64                 mBytesWritten;
	PRUint16                 mCompression;
	nsZipAction              mAction;
	friend class nsZipIOImpl;
};

class nsZipEntryIndex;
struct nsZipEntryItem;
class nsZipEntryFind;

class nsZipFileIO : public nsIZipFileIO
{
public:
	NS_DECL_ISUPPORTS
	NS_DECL_NSIZIPREADER
	NS_DECL_NSIZIPFILEIO

	nsZipFileIO();

	nsresult SeekToItem(nsZipEntryItem* anItem);
private:
	~nsZipFileIO();

	nsresult OpenWithFlags(nsIFile *zipFile, long flags);
	nsresult InflateItem(const nsZipEntryItem* aItem, PRFileDesc* outFD);
	nsresult ExtractFile(nsZipEntryItem *item, const char *outname, PRFileDesc* aFd);
	nsresult CopyItemToDisk(PRUint32 itemSize, PRUint32 itemCrc, PRFileDesc* outFD);
	nsresult CompressFile(nsZipEntryItem *item, nsIFile* inFile, nsZipLevel compress);
	nsresult WriteLocalHeader(const nsZipEntryItem *anItem);
	nsresult CopyItemFromDisk(nsZipEntryItem *anItem, PRFileDesc* inFD);
	nsresult DeflateItem(nsZipEntryItem* aItem, PRFileDesc* inFD, nsZipLevel compress);

	nsCOMPtr<nsIFile>        mZipFile;
	PRLock*                  mLock;	
	PRFileDesc*              mFd;
	PRBool                   mModified;
	nsCOMPtr<nsIZipIOStatus> mStatus;
	nsZipEntryIndex*         mIndex;
	PRUint32                 mCentralDirPos;
	friend class nsZipOutputStream;
};

/**
 * nsZipIOEntry
 */
class nsZipIOEntry : public nsIZipEntry
{
public:
	NS_DECL_ISUPPORTS
		NS_DECL_NSIZIPENTRY

		nsZipIOEntry(nsZipEntryItem* anItem);

private:
	~nsZipIOEntry();

	PRUint16                 mCompression;
	PRUint32                 mSize;
	PRUint32                 mRealSize;
	PRUint32                 mCRC32;
	PRBool                   mIsDirectory;
	PRBool                   mIsSynthetic;
	PRTime                   mTime;
};

/**
 * nsZipEntryEnumerator
 */
class nsZipEntryEnumerator : public nsIUTF8StringEnumerator
{
public:
	NS_DECL_ISUPPORTS
		NS_DECL_NSIUTF8STRINGENUMERATOR

		nsZipEntryEnumerator(nsZipEntryFind *aFind)
		: mFind(aFind), mCurr(nsnull)
		{
			NS_ASSERTION(mFind, "nsZipEntryEnumerator: Missing nsZipEntryFind");
		}

private:
	nsZipEntryFind*          mFind;
	const char*              mCurr;
	~nsZipEntryEnumerator();
};

#define NS_ZIPFILEIO_CLASSNAME "nsZipFileIO"

// {78EA0ED9-754F-4017-B6F2-4E360122AEC0}
#define NS_ZIPFILEIO_CID                                  \
{                                                         \
	0x78ea0ed9,                                       \
	0x754f,                                           \
	0x4017,                                           \
	{ 0xb6, 0xf2, 0x4e, 0x36, 0x1, 0x22, 0xae, 0xc0 } \
}

#endif
